﻿/*
===========================================================================
Immemorsion LGPL Source code
Copyright trszdev - rahimyanov@gmail.com

This file is part of Immemorsion.

Immemorsion is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Immemorsion is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with Immemorsion.  If not, see <http://www.gnu.org/licenses/>.
===========================================================================
*/
using System.Diagnostics;
using System;

namespace Immemorsion.PlatformApi
{
    /// <summary>
    /// "Child classes will gain access for process' operations"
    /// </summary>
    public abstract class WindowsProcessCommunicator : IDisposable, IWindowsProcessCommunicator
    {
        public Process Process { get; private set; }
        public IntPtr ProcessHandle { get; private set; }

        private const uint ProcessAccess =
                (uint)(WindowsProcessAccessType.PROCESS_VM_READ
                | WindowsProcessAccessType.PROCESS_VM_WRITE
                | WindowsProcessAccessType.PROCESS_VM_OPERATION
                | WindowsProcessAccessType.PROCESS_QUERY_INFORMATION);

        public WindowsProcessCommunicator(Process process)
        {
            Process = process;
            ProcessHandle = WindowsApi.OpenProcess(ProcessAccess,0, (uint)process.Id);
        }

        private bool CloseHandle()
        {
            return WindowsApi.CloseHandle(ProcessHandle)==0;
        }

        public void Dispose()
        {
            CloseHandle();
            GC.SuppressFinalize(this);
        }

        ~WindowsProcessCommunicator()
        {
            Dispose();
        }


    }
}
